CN217366583U

CN217366583U - Medicine box

Info

Publication number: CN217366583U
Application number: CN202120812972.6U
Authority: CN
Inventors: 王虹; 张攀; 曹哲铭; 付尔康
Original assignee: Wuhan Sports University
Current assignee: Wuhan Sports University
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-09-06
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a medicine box, which comprises a shell, a rotating baffle, a medicine taking cavity, a driving device and a controller, wherein the shell comprises an upper shell and a middle shell; the rotary baffle is rotatably arranged in the upper shell and is provided with a plurality of partition plates, the partition plates divide the inner cavity of the upper shell into a plurality of medicine distribution cavities on the same plane, the bottom surface of the upper shell is provided with a medicine outlet, and the medicine distribution cavities are aligned with the medicine outlet in turn; the medicine taking cavity is arranged in the middle shell in a movable mode inside and outside, and an opening of the medicine taking cavity is located below the medicine outlet and aligned with the medicine outlet; drive arrangement with rotating baffle links to each other, with the drive rotating baffle rotates, the controller with drive arrangement links to each other, the utility model provides an unable clear and definite how to use medicine of mode of reminding using medicine among the prior art, lead to using inconveniently, the technical problem who makes mistakes easily, convenient to use, security are high.

Description

Medicine box

Technical Field

The utility model relates to a field of nursing at home especially relates to a medicine box.

Background

With the development of science and technology of society, the life of the old is longer and longer, but the old is susceptible to chronic diseases and needs to take medicines in daily life, people around the old accompany the old all day, and the old has obvious memory reduction, generally poor eyesight and is easy to forget to take medicines, so that the disease treatment is influenced; moreover, the patient cannot determine whether the patient takes the medicine or not, and then the repeated medicine taking is carried out, so that great risks are brought to the health of the patient.

The alarm clock can be used for reminding the old people to take medicines, but only plays a role in reminding the medicine taking time, and the old people still have the situation that how to take medicines (what to take and how much to take) is unclear.

Therefore, the above-mentioned techniques have at least the following technical problems: in the prior art, the medicine taking reminding mode cannot clearly determine how to take the medicine, so that the use is inconvenient and mistakes are easy to make.

SUMMERY OF THE UTILITY MODEL

The medicine box provided by the embodiment of the application solves the technical problems that the medicine taking reminding mode in the prior art cannot clearly determine how to take the medicine, so that the medicine box is inconvenient to use and easy to make mistakes.

The present embodiments provide a kit, comprising:

the shell comprises an upper shell and a middle shell;

the rotary baffle is rotatably arranged in the upper shell and is provided with a plurality of partition plates, the partition plates divide the inner cavity of the upper shell into a plurality of medicine distribution cavities on the same plane, the bottom surface of the upper shell is provided with a medicine outlet, and the medicine distribution cavities are aligned with the medicine outlet in turn;

the medicine taking cavity is arranged in the middle shell in a movable mode inside and outside, and an opening of the medicine taking cavity is positioned below the medicine outlet and aligned with the medicine outlet;

and the driving device is connected with the rotating baffle to drive the rotating baffle to rotate.

And the controller is connected with the driving device.

Furthermore, the shell is in a hollow cylinder shape, a medicine feeding opening is formed in the top surface of the upper shell, so that medicine can be conveniently placed in the medicine distributing cavity, and the medicine feeding opening is provided with a sealing cover.

Further, the rotation damper includes:

the shaft sleeve is arranged in the middle of the upper shell;

the inner end faces of the partition plates are fixedly connected with the outer peripheral face of the shaft sleeve, and the outer end faces of the partition plates radiate outwards along the radial direction of the shaft sleeve to divide the inner cavity of the upper shell into a plurality of fan-shaped medicine distribution cavities.

Further, well casing includes upper strata and lower floor, the chamber of getting it filled sets up in the upper strata, drive arrangement sets up in the lower floor, drive arrangement includes:

a stepping motor disposed in the lower layer of the middle case;

and the bottom end of the connecting shaft rod is connected with an output shaft of the stepping motor through a gear reducer, and the top end of the connecting shaft rod upwards extends through the upper layer and is fixedly arranged in the shaft sleeve so as to drive the rotating baffle to rotate.

Further, the controller includes:

the control module is connected with the stepping motor;

a predetermined rotation angle input module to input a predetermined rotation angle to the control module;

a predetermined time input module to input a predetermined time to the control module;

the control module is respectively connected with the stepping motor, the preset rotation angle input module and the preset time input module and controls the stepping motor to rotate by a preset rotation angle in preset time;

and the alarm is connected with the preset time input module to give an alarm action at preset time so as to remind a user to take medicine.

Furthermore, a first window used for being inserted into the medicine taking cavity is formed in the shell where the upper layer is located, and a first bin body containing the medicine taking cavity is arranged in the upper layer.

Further, the housing further comprises:

the lower casing, the lower casing is located the below of well casing, the internal first aid medicine chamber that is equipped with of lower casing, the internal second storehouse body that holds first aid medicine chamber that is equipped with of lower casing, offer on the casing down and be used for inserting the second window in first aid medicine chamber.

Further, the first-aid medicine cavity is connected with a locking device for locking and unlocking the first-aid medicine cavity.

Further, the locking device comprises:

the rack is horizontally arranged in the lower shell, the outer end of the rack is exposed out of the lower shell, and one side of the rack is provided with first teeth;

the gear is rotatably arranged in the lower shell and is meshed with the rack;

the top end of the cam is fixedly connected with one end of the gear, and one side of the cam is abutted against the outer side surface of the first-aid medicine cavity.

Furthermore, a track groove is formed in the lower shell, the rack is movably arranged in the track groove, one side of the track groove is opened, and meshing teeth of the rack are exposed;

a rotating shaft is fixed in the lower shell, and the gear is rotatably arranged on the rotating shaft.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

(1) this application embodiment the medicine box is through setting up shell, rotating the baffle, getting it filled chamber, drive arrangement and controller, rotating the baffle has a plurality of division board, the division board will the branch medicine chamber on the coplanar is separated into to the last casing inner chamber of shell, the bottom surface of going up the casing is equipped with a medicine outlet, puts into each branch medicine intracavity according to time sequence with each medicine that different times need be taken in proper order, controller control drive arrangement drives in scheduled time rotating the baffle rotates predetermined turned angle to make the branch medicine chamber that the medicine that this time need be taken place with the medicine outlet aligns and falls into and gets it filled the intracavity, takes out on time get it filled chamber, medicine in it is the dose and the kind of using medicine at this moment, take out and take can, make things convenient for the province heart, can not make mistakes, solved and reminded that the mode of using medicine can's among the prior art can't clearly how to use medicine, the technical problems of inconvenient use and easy error are solved, and the beneficial effects of convenient use, high safety and capability of meeting the use requirements of the old are realized.

(2) The embodiment of the application sets up a plurality of minutes medicine chambeies for once only offe medicine can satisfy and use medicine many times, and the practicality is strong.

(3) The controller comprises an alarm, wherein the alarm is connected with the preset time input module to give an alarm action in preset time to remind a user to take medicine, and the practicability is improved.

(4) This application embodiment is equipped with puts first aid medicine chamber to when the emergent emergency of old person, for the old person provides first aid medicine, remind old person's family members through the SMS, the old person takes place emergency at home, the security is high, the practicality is strong.

(5) This application embodiment the first aid medicine chamber pass through locking device with the body coupling needs inside level promotion down the rack just can will through the cooperation of rack, gear and cam the first aid medicine chamber is released to take the medicine, both can effectively prevent that first aid medicine chamber accident from opening, the good reliability can not waste time and energy when first aid medicine chamber need be opened under emergency again.

Drawings

FIG. 1 is an exploded view of a first embodiment of a drug cassette;

FIG. 2 is an exploded view of a second embodiment of a drug cassette;

FIG. 3 is an exploded view of a third embodiment of a drug cassette;

fig. 4 is a schematic structural diagram of a rotation baffle of a medicine box provided in an embodiment of the present application.

Detailed Description

By providing the medicine box, the technical problems that the medicine taking reminding mode in the prior art cannot clearly determine how to take the medicine, the use is inconvenient, and mistakes are easily made are solved.

In order to solve the technical problems, the technical scheme provided by the application has the following general idea: through setting up shell, rotating the baffle, getting it filled chamber, drive arrangement and controller, rotating the baffle and having a plurality of division board, the division board will the last casing inner chamber of shell is separated into a plurality of branch medicine chambeies that lie in the coplanar, the bottom surface of going up the casing is equipped with a medicine mouth, puts into each branch medicine intracavity according to the time sequence in proper order with each medicine that different times need be taken, controller control drive arrangement drive at scheduled time rotating the baffle rotates predetermined turned angle to make the branch medicine chamber that the medicine that needs to be taken at this time belongs to with go out the medicine mouth and aim at and fall into the medicine taking intracavity, take out on time the medicine taking chamber, medicine in it is the dose and the kind of using medicine at this moment, take out the medicine and take, convenient save worry, can not make mistakes, solved and reminded the mode of using medicine among the prior art and clearly how to use medicine, the technical problems of inconvenient use and easy error are solved, and the beneficial effects of convenient use, high safety and capability of meeting the use requirements of the old are realized.

The technical solutions of the present application are described in detail below with reference to the accompanying drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples are described in detail in the technical solutions of the present application, but not limited to the technical solutions of the present application, and the technical features in the embodiments and examples may be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of a medicine cartridge provided in an embodiment of the present application, and as shown in fig. 1, the medicine cartridge includes a housing, a rotating shutter 110, a medicine taking cavity 210, a driving device, and a controller.

The shell comprises an upper shell 100, a middle shell 200 and a lower shell 300, wherein the upper shell 100 is positioned above the middle shell 200, the middle shell 200 is positioned above the lower shell 300, the upper shell 100 is sleeved above the middle shell 200, and the middle shell 200 is sleeved above the lower shell 300.

The rotating baffle 110 is rotatably arranged in the upper shell 100, the rotating baffle 110 is provided with a plurality of partition boards 111, the partition boards 111 divide the inner cavity of the upper shell 100 into a plurality of medicine dividing cavities on the same plane, the bottom surface of the upper shell 100 is provided with a medicine outlet 270, and the medicine dividing cavities are aligned with the medicine outlet 270 in turn to discharge medicines.

Specifically, as shown in fig. 1-4, the bottom surface of division board 111 is pressed close to go up the bottom surface of casing 100, the short distance is pasted to the outside face of division board 111 go up the medial surface of casing 100, thereby when rotating baffle 110 rotates, drive the medicine that corresponds the branch medicine intracavity and rotate, just go up the internal surface of casing 100 with rotating baffle 110's surface is all smooth, so that rotating baffle 110 is in go up the casing 100 internal rotation. When the rotating baffle 110 rotates according to a preset rotating angle, the medicine distribution cavities are aligned with the medicine outlet 270 in turn, so that the medicines in the medicine distribution cavities fall from the medicine outlet 270.

The medicine taking cavity 210 is movably arranged in the middle shell 200 in the inside and outside, and the opening of the medicine taking cavity 200 is positioned below the medicine outlet 270 and aligned with the medicine outlet 270, so as to receive the medicine falling from the medicine outlet 270.

The driving device is connected to the rotating barrier 110 to drive the rotating barrier 110 to rotate. The controller is connected to the driving means to drive the rotating flap 110 to rotate by a predetermined rotation angle at a predetermined timing.

Specifically, the medicines (one or more) to be taken at different times are sequentially placed into the medicine dividing cavities (for example, clockwise) in time sequence, the controller controls the driving device to drive the rotary baffle 110 to rotate (for example, clockwise) by a preset rotation angle at a preset time, so that the medicine dividing cavity where the medicine to be taken at the time is located is aligned with the medicine outlet 270 and falls into the medicine taking cavity 210, and the medicine in the medicine taking cavity 210 can be taken by drawing out the medicine taking cavity 210.

This application embodiment the medicine box is through setting up shell, rotating baffle 110, getting it filled chamber 210, drive arrangement and controller, rotating baffle 110 has a plurality of division board 111, division board 111 will the branch medicine chamber on the coplanar is separated into a plurality of to last casing 100 inner chamber of shell, the bottom surface of going up casing 100 is equipped with a medicine mouth 270, puts into each branch medicine intracavity according to the time sequence with each medicine that different times need be taken in proper order, controller control drive arrangement drives at scheduled time rotating baffle 110 rotates predetermined turned angle to make the time need the medicine of taking place divide the medicine chamber with go out medicine mouth 270 aim at and fall into and get it filled chamber 210 in, take out on time get it filled chamber 210, the medicine in it is the dose and the kind of using medicine at this moment, take out can, convenient save worry, can not make mistakes, solved the unable clear how to use of the mode of reminding to use medicine among the prior art, the technical problems of inconvenient use and easy error are solved, and the beneficial effects of convenient use, high safety and capability of meeting the use requirements of the old are realized.

In addition, this application embodiment sets up a plurality of medicine chambeies of dividing for once only offe medicine can satisfy and use medicine many times, and the practicality is strong.

In an embodiment of the present application, the upper housing 100 and the middle housing 200 are both hollow cylindrical, a drug dispensing opening is formed in a top surface of the upper housing 100 so as to dispense drugs into the drug dispensing cavity, and a sealing cover 400 is provided to the drug dispensing opening, and the sealing cover 400 is in threaded connection with the upper housing 100. When the medicine taking cavity 210 is located in the middle shell 200, the opening of the medicine taking cavity 210 completely covers the opening 270 for discharging medicine, so that medicine cannot enter the medicine taking cavity 210.

In an embodiment of the present application, as shown in fig. 4, the rotating baffle 110 includes a sleeve and a plurality of the partition plates 111. The shaft sleeve is arranged in the middle in the upper shell 100; the inner end surfaces of the plurality of partition plates 110 are fixedly connected with the outer peripheral surface of the shaft sleeve, the outer end surfaces of the partition plates 110 radiate outwards along the radial direction of the shaft sleeve, and the partition plates 110 are perpendicular to the inner bottom surface of the inner cavity of the upper shell 100 to divide the inner cavity of the upper shell 100 into a plurality of fan-shaped medicine distribution cavities.

Specifically, the rotating baffle 110 includes 8 partition plates 111 that set up at equal angular intervals, partition plate 111 is the rectangle, 8 partition plate 111 will go up casing 100 and separate into 8 fan-shaped medicine separating chambers to satisfy the demand of once dispensing, can use in succession many times.

In one embodiment of the present application, the middle shell 200 includes an upper layer and a lower layer, the medicine taking cavity 210 is disposed in the upper layer, the driving device is disposed in the lower layer, the driving device includes a stepping motor 220 and a connecting shaft 240, the stepping motor 220 is disposed in the lower layer of the middle shell 200; the bottom end of the connecting shaft rod 240 is connected to the output shaft of the stepping motor 220 through a gear reducer 230, and the top end extends upward through the upper layer and is fixedly disposed in the shaft sleeve, so as to drive the rotating baffle 110 to rotate.

Specifically, the gear reducer 230 reduces the rotation speed to a suitable value and drives the connecting shaft rod 240 and the rotating baffle 110 to rotate clockwise coaxially, and when the rotating baffle 110 rotates clockwise, the medicines in the medicine dispensing cavities are sequentially pushed into the medicine taking box 210 below, and one medicine dispensing cavity is pushed once per rotation. As shown in fig. 1, a mounting sleeve 260 for the connecting shaft rod 240 to pass through is provided at the central axis of the upper layer.

The controller comprises a control module, the control module is connected with the stepping motor 220, the controller further comprises a preset rotation angle input module and a preset time input module, and when a user inputs a preset rotation angle and preset time to the control module through the preset rotation angle input module and the preset time input module, the control module controls the stepping motor 220 to rotate by the preset rotation angle in the preset time.

The controller further comprises an alarm which is connected with the preset time input module and used for giving an alarm action at preset time to remind a user of taking medicine.

In an embodiment of the present application, a first window for inserting the medicine taking cavity 210 is opened on the housing where the upper layer is located, and a first bin body 250 for accommodating the medicine taking cavity 210 is arranged in the upper layer.

Specifically, the cross-sectional shape of the medicine taking cavity 210 is a sector shape, and is adapted to the medicine dividing cavity, and the shape of the first bin body 250 is adapted to the medicine taking cavity 210, so as to guide the medicine taking cavity 210 to slide into or into the first bin body. The medicine taking cavity 210 and the middle shell 200 can be connected in a buckling manner, for example, a buckling groove can be formed in the outer end face of the first bin body, a plug is arranged at a corresponding position of the medicine taking cavity 210, and when the medicine taking cavity 210 slides into the first bin body, the plug is just inserted into the buckling groove, so that the positioning of the medicine taking cavity 210 in the first bin body is ensured. The medicine taking cavity 210 is pulled outwards, the plug is separated from the buckle groove, and the medicine taking cavity 210 can be pulled out from the first bin body.

In an embodiment of the present application, the outer shell further includes a lower shell 300, the lower shell 300 is located below the middle shell 200, a first-aid medicine cavity 310 is arranged in the lower shell 300, a second cabin body 360 for accommodating the first-aid medicine cavity 310 is arranged in the lower shell 300, and a second window for inserting the first-aid medicine cavity 310 is opened on the lower shell 300.

In an embodiment of the present application, a locking device for locking and unlocking the emergency medicine cavity 310 is connected thereto.

In one embodiment of the present application, the locking device includes a rack 320, a gear 330 and a cam 340, the rack 320 is horizontally disposed in the lower housing 300, an outer end of the rack 320 is exposed out of the lower housing 300, and one side of the rack 320 is provided with engaging teeth; the gear 330 is rotatably disposed in the lower housing 300, and the gear 330 is engaged with the engaging teeth of the rack 320; the top end of the cam 340 is fixedly connected with one end of the gear 330, and the convex teeth of the cam 340 are abutted against the outer side surface of the emergency medicine cavity 310.

Specifically, the rack 320 is pushed horizontally inwards, the meshing teeth on the rack 320 drive the meshed gear 330 to rotate, the gear 330 synchronously drives the cam 340 located below to rotate, and the rotating cam 340 continuously stirs the outer side surface of the first-aid medicine cavity 310, so that the first-aid medicine cavity 310 is pushed outwards and smoothly.

Further, a spring 350 is arranged at the inner end of the rack 320, and a trigger switch is further arranged in the lower shell 300, the trigger switch is located on the motion track of the spring 350, and the trigger switch is connected with the controller.

Specifically, when the spring 350 is abutted to the trigger switch, the trigger switch drives the controller to start, and the controller controls the alarm to give an alarm. For example, the trigger switch may be a pressure sensor, the pressure sensor transmits the detected pressure to a controller, a pressure threshold is pre-stored in the controller, when the spring 350 collides with the pressure sensor, a real-time pressure value detected by the pressure sensor is greater than the pressure threshold, and the controller starts the alarm to give an alarm.

In addition, the controller also comprises a signal communication module, the signal communication module can be communicated with a mobile phone with a specified mobile phone number, and when the alarm gives an alarm sound, a prompt short message, such as a 'dripping' prompt sound short message, is sent to the mobile phone with the specified mobile phone number.

This application embodiment the medicine box can satisfy needs from time to time through setting up first aid medicine chamber 310, just first aid medicine chamber 310 through locking device with casing 300 is connected down, needs the inside level to promote rack 320 just can be through the cooperation of rack 320, gear 330 and cam 340 will first aid medicine chamber 310 is released to take the medicine, both can effectively prevent that first aid medicine chamber 310 from accidentally opening, the good reliability can not waste time and energy when emergency medicine chamber 310 need be opened again under emergency.

In one embodiment of the present application, a track groove 370 is formed in the lower housing 300, the rack 320 is movably disposed in the track groove 370, and an opening 371 is formed at one side of the track groove 370 to expose the engaging teeth of the rack 320; a rotation shaft 380 is fixed in the lower case 300, and the gear 330 is rotatably provided on the rotation shaft 380.

The technical scheme in the embodiment of the application at least has the following technical effects or advantages:

(1) the medicine box of the embodiment of the application is through setting up shell, rotating baffle 110, getting it filled chamber 210, drive arrangement and controller, rotating baffle 110 has a plurality of division board 111, division board 111 will go up 100 inner chambers of shell separate into a plurality of branch medicine chambers that lie in the coplanar, the bottom surface of going up casing 100 is equipped with a medicine mouth 270, puts into each branch medicine intracavity in proper order with each medicine that different times need to be taken according to the time sequence, controller control drive arrangement drives at scheduled time rotating baffle 110 rotates predetermined turned angle to make the branch medicine chamber that the medicine that this time needs to be taken place with go out in medicine mouth 270 aims at and fall into and get it filled chamber 210, take out on time get it filled chamber 210, the medicine in it is the dose and the kind of using medicine at this moment, it can to take out the medicine, convenient province heart, can not make mistakes, the technical problems that the use is inconvenient and mistakes are easy to make due to the fact that the medicine taking mode in the prior art cannot be determined, and the beneficial effects that the use is convenient, the safety is high and the use requirements of the old are met are achieved.

(3) The controller comprises an alarm, the alarm is connected with the preset time input module to give an alarm in preset time, so that a user is reminded to take medicine, and the practicability is improved.

(4) This application embodiment satisfies need from time to time through setting up first aid medicine chamber 310 to when not going out the medicine to scheduled time or divide the medicine chamber to go out the medicine to break down the time first aid, the security is high, the practicality is strong.

(5) The first-aid medicine cavity 310 of the embodiment of the present application is connected with the lower housing 300 through a locking device, and needs to be pushed horizontally inwards to the rack 320, so that the first-aid medicine cavity 310 can be pushed out through the cooperation of the rack 320, the gear 330 and the cam 340, and then the medicine can be taken out, thereby not only effectively preventing the first-aid medicine cavity 310 from being opened accidentally, but also having strong reliability, and avoiding time and labor waste when the first-aid medicine cavity 310 needs to be opened in an emergency situation.

It should be understood that the terms of orientation of up, down, left, right, front, back, top, bottom, etc., referred to or may be referred to in this specification, are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed accordingly depending on the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

While the foregoing is directed to the preferred embodiment of the present application, and not to the limiting thereof in any way and any way, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present application; moreover, any equivalent alterations, modifications and variations of the above-described embodiments according to the spirit and techniques of this application are intended to be within the scope of the claims of this application.

Claims

1. A kit, comprising:

the shell comprises an upper shell and a middle shell;

the rotary baffle is rotatably arranged in the upper shell and is provided with a plurality of partition plates, the partition plates divide an inner cavity of the upper shell into a plurality of medicine distribution cavities on the same plane, the bottom surface of the upper shell is provided with a medicine outlet, and the medicine distribution cavities are aligned with the medicine outlet in turn;

the driving device is connected with the rotating baffle to drive the rotating baffle to rotate;

and the controller is connected with the driving device.

2. The drug container of claim 1, wherein the housing is a hollow cylinder, the top surface of the upper housing has a drug dispensing opening for dispensing the drug into the drug dispensing chamber, and the drug dispensing opening is provided with a sealing cover.

3. The medication holder of claim 1 wherein said rotatable flap comprises:

the shaft sleeve is arranged in the middle of the upper shell;

4. A kit according to claim 3, wherein the middle housing comprises an upper layer and a lower layer, the access chamber being disposed in the upper layer and the drive means being disposed in the lower layer, the drive means comprising:

a stepping motor disposed within the lower layer of the middle housing;

5. The kit of claim 4, wherein the controller comprises:

the control module is connected with the stepping motor;

and the alarm is connected with the preset time input module so as to give an alarm action at preset time and remind a user to take medicines.

6. The medicine box according to claim 4, wherein the housing of the upper layer is provided with a first window for inserting the medicine taking cavity, and the upper layer is provided with a first bin body for accommodating the medicine taking cavity.

7. The kit of claim 1, wherein the housing further comprises:

8. A kit as claimed in claim 7, wherein the first-aid chamber is connected to locking means for locking and unlocking the first-aid chamber.

9. A cassette as claimed in claim 8, wherein said closure means comprises:

the gear is rotatably arranged in the lower shell and is meshed with the rack;

10. The drug cassette of claim 9, wherein a track groove is formed in the lower housing, the rack is movably disposed in the track groove, and one side of the track groove is opened to expose the engaging teeth of the rack;